Watercress is a rich source of gluconasturtiin, the precursor of phenethyl isothiocyanate (PEITC), while garden cress is rich in glucotropaeolin, the precursor of benzyl isothiocyanate (BITC) (see Food sources)
Third Party Testing
Matek, D., Matek, I., Staresinic, E., Japjec, M., Bojanic, I., Blagaic, A
Article by Amna Zubair I am Amna Zubair, a pharmacist at Dvago Pharmacy and Wellness Experts
When Direct Glutathione Supplementation Makes Sense So when does it make more sense to go straight to the source and supplement with glutathione itself instead of relying on NAC to boost your natural production